TAS2X63EVM: No audio in speaker output

Hi Jorgen,

What is your procedure to initialize the device? Please follow these steps:

• Connect EVM to USB and 5V power supply.
• Power up 5V, this should turn on D1 and D2 LEDs.
• Open PPC3 and TAS2563QFN plugin.
• Go to "Device Control".
• Change from "Tuning Mode" to "ROM Mode" at the top-right drop-list.
• Click on "Apply".
• Click on "IRQ" and then "Read" on the pop-up window.
• Try playing audio through any other software, like media player or web browser.
• Go back to PPC3 and repeat the process for "IRQ", compare the active flags and please share to double check if there's any error being detected.

Could you please also try by setting J18 = 3.3V?
Since you're able to probe I2S testpoints on EVM, could you double check if SBCLK or FSYNC is changing its frequency or duty cycle the first time you try to play audio?

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan,

Thanks for your quick answer. Apart from reading IRQs, the procedure described is what I do. Here are my observations when I do exactly as you describe… 

J18 = 1.8V:

• Connect EVM to USB and 5V power supply. Done.
• Power up 5V, this should turn on D1 and D2 LEDs. Both LEDs light up, FSYNC 48kHz (75ns 1.8V pulses), SBCLK 12.3MHz (1.8V).
• Open PPC3 and TAS2563QFN plugin. Done, manual connect successful.
• Go to "Device Control". Done.
• Change from "Tuning Mode" to "ROM Mode" at the top-right drop-list. Done.
• Click on "Apply". Data is successfully transferred.
• Click on "IRQ" and then "Read" on the pop-up window. PLL Lock, Device Power Down, Device power Up ‘Latched’.  PLL Lock, Device power Up ‘Live’.
• Try playing audio through any other software, like media player or web browser. No audio in speaker, FSYNC 48kHz, SBCLK 12.3MHz, SDIN alive. No change is observed in FSYNC or SBCLK when starting the player.
• Go back to PPC3 and repeat the process for "IRQ", compare the active flags and please share to double check if there's any error being detected.  Now also the TDM Clock Error flag ‘Latched’. No change in ‘Live’ view.

J18 = 3.3V:

• Connect EVM to USB and 5V power supply. Done.
• Power up 5V, this should turn on D1 and D2 LEDs. Both LEDs light up, FSYNC 48kHz (75ns 3.3V pulses), SBCLK 12.3MHz (3.3V).
• Open PPC3 and TAS2563QFN plugin. Done, manual connect successful.
• Go to "Device Control". Done.
• Change from "Tuning Mode" to "ROM Mode" at the top-right drop-list. Done.
• Click on "Apply". Data is successfully transferred.
• Click on "IRQ" and then "Read" on the pop-up window. PLL Lock, Device Power Down, Device power Up ‘Latched’. PLL Lock, Device power Up ‘Live’.
• Try playing audio through any other software, like media player or web browser. No audio in speaker, FSYNC 48kHz, SBCLK 12.3MHz, SDIN alive. No change is observed in FSYNC or SBCLK when starting the player.
• Go back to PPC3 and repeat the process for "IRQ", compare the active flags and please share to double check if there's any error being detected.  Now also the TDM Clock Error flag ‘Latched’. No change in ‘Live’ view.

My oscilloscope is not able to show it in any detail, but it seems there may be a small SBCLK glitch or phase shift at the moment the playback starts, both in 1.8V and 3.3V supply mode.

Can you think of anything else I can test for, either debug informatioin or maybe checking some signals around the TAS2563-chip itself?

Best regards,
Jørgen

Hi Jørgen,

Thanks for checking this, it seems there's a clock issue, although it's not clear why this could happen.
There's a marking on the EVM silkscreen top side saying "AMPS122", could you please let me know what is the letter at the end of this marking? I'd like to double check you have the latest version of the EVM.

Do you have more than 1 EVM you can test?

If you try the same as above, then after the clock error click on "Apply" again, and then try to play audio once more, does the issue happens again?

Best regards,
-Ivan Salazar
Applications Engineer

Hi Ivan,

Marking on the EVM silkscreen top side saying "AMPS122", could you please let me know what is the letter at the end of this marking? – Marking reads ‘AMPS122C’.

Do you have more than 1 EVM you can test? – No, I just have one board. If it makes sense, I could get another one over Christmas.

If you try the same as above, then after the clock error click on "Apply" again, and then try to play audio once more, does the issue happens again? – Yes, the error (no audio heard) remains:

• Clear the IRQ log
• Re-apply ROM mode
• Open audio stream from external player (letting player continue uninterrupted makes no difference)
• No audio is heard (player is running, I2S signals are running as expected, no glitch observed)
• Read latched IRQs: Device Power Down, Device Power Up, PLL Lock are highlighted. TDM Clock Error is not indicated. So, the TDM Clock Error is indicated only after power-off/power-on of the board.

Best regards,
Jørgen

Hi Jørgen,

The version of the EVM is the latest one, it should be OK.

This is a quite odd failure behavior, I'd prefer to test a new board. Alternatively, we could try disabling the clock error and check how it behaves, but there seems to be something wrong on this board.

Best regards,
-Ivan Salazar
Applications Engineer